Finding the Fourth Proportional to 137,789.76, 207,030.72 and 87,892.80

Step by Step Solution

1. Step 1: Write the proportion equation
   137,789.76 : 207,030.72 = 87,892.80 : x
2. Step 2: Convert to fraction form
   137,789.76/207,030.72 = 87,892.80/x
3. Step 3: Cross multiply
   137,789.76x = 207,030.72 × 87,892.80
4. Step 4: Simplify right side
   137,789.76x = 18,196,509,666.82
5. Step 5: Solve for x
   x = 18,196,509,666.82/137,789.76
6. Step 6: Final answer
   x = 132,059.96